Steam shovel or dredge dipper



Jan. 1,1924 1,479,340

- .L A. TRAINQR STEAM SHOVEDOR DREDGE DIPPER Filed March 17. 1923 Patented dan. l, 1924.

OFFICE. l

JOSEPH A. TRAINOR, OE HIGH BRIDGE, NEW JERSEY, AssIGNOR To TAYLOR-WHAJB.-

TON IRON AND STEEL COMPANY, or HIGH BRIDGE, NEW JERSEY, A CORPORATION OF NEW JERSEY.

STEAM SHGVEL R DREDGE DIPPE-R.

Appnoanonmed March 17, i923.. serial No. 625,851.

To all whom it may concern: l

- Be it known that I, JOSEPH A. TRAINOR, a citizen of the, United States, residing at" Hi h Bridge, in the county of Hunterdon an State of New Jersey, have invented certain new and useful Improvements in Steam Shovels or Dredge Dippers, vof which the following is a specification.

Steam shovel or excavating dippers are expensiveto manufacture and .their upkeep is also a serious item of expense. Hence, they are 'usually of composite or built-up construction so as to admit of the use of comparatively inexpensive metal in those sections less exposed to continuous shock and wear and so as to facilitate the renewal or replacement of the v more exposed sections which are generally formed of manganese steel or other alloy steel.` The elements are rigidly connected by lap 'oints and by rivets. -I-Ience, the dipper o ers little or no resilience to the shocks and stresses to which it is subjected and a heavy strain is imposed upon the rivets which frequently work ae loose andare subject to shearing.

Principal objects of my invention are to reduce the cost of manufacture and the upkeep Of dippers; to provide a clipper of composite construction which shall be possessed v of great strength and of suiicient flexibility or resiliency to relieve the strain on the rivets; to provide a dipper constituted of four principal parts-front, back, and sidesconnected by a novel form of compensating lock joint; to provide a novel form, of mounting for the bail brackets; to provide a stop or abutment for the .bail brackets to relieve the strain on the rivets thereof; and to provide means for protecting theV sides against excessive wear.

An embodiment of the invention is illus trated in the accompanying drawings,

wherein- Figure 1 is a perspective view of the improved dipper. f j

Fig. 2 is a side elevational view of the Fig. 3 is a section on line 3-3 of Fig. 2. In the specific embodiment illustrated, the

dipper comprises a front 5, a back 6, and a pair of side panels 7 The front and back, except as hereinafter stated, are, or may be, as usual, and may be equipped as` usual.

They arey joined by the side panels Awhlch are rectangular plat-es of the full depth ofthe dipper. For this purpose-the back has L extenslons 8 in line with the extensions 9 O1 the front. The panels 7 overlie said extnv sions and their longitudinal-edges-abut and are protected by lugs 10 and- 11, respectivel The usual rivets are indicated at 12. n

-order to relieve the strain on the rivets, a

compensatin llock joint 4is provided. This is accomplis ed by longitudinally ranging ribs 13 and 14 on the front andback extensions and by 'corresponding'mortises or grooves 15 and 16 in each of the side panels.

The pair of mated joints admit Vo'f the neces sary compensating or yield-in movement to avoid undesirable strain on tIie'rivets.' Each of the side panels is equipped with an external rib 17 and the bail brackets 18 are correspondingly mortised, as at 19, to establish a yielding or compensating tongue and groove connection` with the panels.I The usual rivet connectionis indicated at 20.

Another merit of the invention is the provision ofthe aprons 2 1jwhichare carried by the side panels and havea two-fold function that is to say, to protect the top edges of the panels and to act as stops ory abutments for the bail brackets and so relieve the strain on the rivets thereof when the general direction of stress is as indicatedatmy in Fig.' 2. The elementsl 21 are preferably manganese steel plates'positioned'to take the wear incident to the operationof the bail. The bear against the body ofthe bail brac ret, as indicated at 22, andeach has a flange 23 which overlies the top edge of a side panel. The ange 23 extends from front to back and thus protects the side panels from violent contact with the 'material being handled.

of flexibility imported by the panelspanels overlying said extensions and having a double tongue lock connection therewith to impart a degree of flexibility to the dipper to enable it to resist shocks and stresses.

2. A dipper embodying a front and back having confronting extensions, side panels' overlying said extensions and having a double tongue lock connection therewith, and lugs on said extensions and cio-operating with the longitudinal edges f the panels.

3. A dipper embodying a Jfront and back joined by side panels of the full depth of the clipper and capable of compensating movement to relieve the strain on the rivet connections, and bail brackets riveted to the side panels and having tongue lock connections therewith to relieve the strain on the rivets. j

4. A dipper embodying a front, a back, and a pair of side panels, bail brackets carried by the side panels, and aprons which shroud and protect the top edges of the panels incident to the operation of the bail and constituting abutments for the bail brackets.

5. A dipper embodying a front, a back,l

and a pair'of said panels, bail brackets carried by the side panels7 and abutments for the bail brackets and having flanged portions Which overlie the top edges of the side panels. v

6. A dipper embodying a front and a back with spaced sidesjoined by separate side panels consisting of rectangular plates interlocked with the front and back and having their longitudinal edges confined! by surface projections.

7. A dipper embodying a front and a back with spaced sides joined by separate side panels consisting of rectangular plates interlocked with the front and back and having their longitudinal edges conned by lugs'on the front and back.

8. A side panel for dippers7 consisting of a rectangular plate having on one side thereof grooves adjoining the longitudinal edges, and having' on the other side -a rib intermediate the grooves.

9. A dipper embodying a front and a back and separate side plates intermediate thereof and of the yfull depth of the dipper, said side plates being riveted toI the front and back and also having an interlocking connection therewith to relieve the strain on the rivets.

10. A dip'per embodying a front and' back with spaced side extensions having substantially parallel longitudinal offsets, and.

side plates Secured relatively' to said extensionsund having their longitudinal edges abuttingsaid offsets.

11. A dipper 'embodying a front and back With-spaced side extensions having lateral oi'sets, side plates secured relatively to said extensions and having their longitudinal edges bearing against said offsets, and. aprons carried by the side plates for protecting the top edges thereof.

In testimony whereof I aiix my Signature.

I JOSEPH A. .TRAINORL 

